ASoC: atmel: mchp-pdmc: print the correct property name

The correct property is 'microchip,mic-pos', not 'mchp,mic-pos', so
replace all occurences of 'mchp,mic-pos' with 'microchip,mic-pos'.
Fix a multi-line comment format while we are at it.

Fixes: 50291652

 ("ASoC: atmel: mchp-pdmc: add PDMC driver")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20220318092609.130901-1-codrin.ciubotariu@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>